The purpose of the research effort was to develop and field test a unique color and shape coding system which offered promise as a supplement to conventional guide signing on problem interchanges. Following a review of the technical literature, a series of laboratory studies was conducted to empirically identify the most appropriate color and shape combinations for symbol signs. The symbol signs were used in various ways in the design of five color/shape coded route guidance systems which were installed and subjected to field evaluation on problem interchanges. With the exception of the initial system evaluated, all other systems resulted in operations and safety benefits as evidenced by a statistically significant reduction in erratic maneuvers and a significant improvement in other operational measures. It was concluded that the color/shape coding concept as applied to freeway route guidance results in sufficient benefit to merit further development and testing of such systems. This volume presents an executive summary of the project activities and results.

  • Supplemental Notes:
    • See also Volume 2, PB-282 535. Also available in set of 3 reports PC E08, PB-282 533-SET.
  • Corporate Authors:

    Institute for Research

    257 South Pugh Street
    State College, PA  United States  16801

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hostetter, R S
  • Publication Date: 1978-3

Media Info

  • Pagination: 53 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00180871
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA/RD-78-61
  • Contract Numbers: DOT-FH-11-8849
  • Files: NTIS, USDOT
  • Created Date: Sep 14 2002 12:00AM